Register API endpoints from outside the clouds.

Another step in our principled separation, this adds a small wrapper
to register-endpoint to register all the endpoints for a control
plane.

Change-Id: I803cb37625051f5e20cb75e04c6c2e7a1c6a1e23
Remove non-baremetal flavors in setup-baremetal.

Currently it's impossible to mix baremetal and non-baremetal
hypervisors. We could leave the flavors intact, but that just makes it
possible for users to shoot themselves in the foot trying to boot
instances on them.

Change-Id: I7f60d0449f2881702574527c8ddb34526aaea8f4
Merge "Register API endpoints from outside the clouds."
Merge "Remove non-baremetal flavors in setup-baremetal."